目标导航小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.comWhenapersonfirstfromhisheartbegantostruggle,heisamanofvalue.当一个人先从自己的内心开始奋斗，他就是个有价值的人。UsingLanguage&OtherParts重点词汇1．organicadj.2．pesticiden.3．bacteriumn．(pl.bacteria)4．fertiliser/fertilizern.5．mineraln.6．groceryn.7．widespreadadj.8．digestvt.&vi.9．essentialadj.10．alternativen.11．rootn.12．prohibitvt.13.prohibitionn.14．instancen.词汇拓展1．depthn．向下(或向里)的距离；深(度)→adj.深的→v．加深2．entirelyadv.全部地；完整地；完全地→adj.全部的重点词组1．Inturn2．Attheexpenseof3．take...intoaccount4．Desperatefor5．Focuson6．Without(a)doubt7．Forinstance8．Startup9．Ineveryaspect重点句型1．过去分词短语作后置定语Theyoftenchangethekindofcropeveryfewyears.他们每隔几年就会把每块地里种植的作物变换一下。2．现在分词短语作状语，表示一种自然而然的结果Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground，小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com知识精讲小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com.轮换种植的原因就是这些作物会把重要的矿物质重新释放回土壤中，为种植下一批庄稼作好准备。3．that引导的同位语从句Whatkeepsthemfromdoingsoisthefact.阻止他们这样做的是这样一个事实，即化学耕作满足了全世界对粮食的高需求。知识点01原文呈现CHEMICALVERSUSORGANICFARMINGChemicalpesticides①andartificial②fertilisershavebeeninwidespread③useinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced，manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction【1】．Overtime，however，whatsomescientistshavefoundisthattheirlong－termusecansometimesharmboththelandandpeople’shealth.【1】此处为不定式短语作后置定语，修饰agreatway。Forexample，pesticidescandamagethelandbykillingnotonlyharmfulbacteria④andinsects，butalsohelpfulones.Inaddition，thesechemicalscanstayinthesoilandundergroundwatersources⑤foralongtime.Thisaffectsthecropsgrownonthelandand，inturn⑥，theanimalsandhumanswhodigest⑦them.Manypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.Infact，somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asfor⑧chemicalfertilisers，cropsgrownwiththemusuallygrowtoofasttoberichinnutrition【2】．Theymaylookbeautifulontheoutside，butinsidethereisusuallymorewaterthanessential⑨minerals⑩，andtheyoftenhavelessflavouraswell.【2】画线部分为简单句。grownwiththem为过去分词短语作后置定语，修饰crops；句子包含“too...to...”结构，表示“太……而不能……”。Asanalternative⑪，somefarmershaveswitchedtoorganicfarming，andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery⑫.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.Forexample，manyorganicfarmersusenaturalwastefromanimalsasfertiliser.Thismakesthesoilintheirfieldsricherinminerals.Italsokeepstheair，soil，water，andcropsfreeofchemicals.Organicfarmersalsousemanyothermethodstoproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear.Forinstance⑬，theymaygrowcornorwheatinafieldoneyear，andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground，makingitreadyforthenextbatchofcrops【3】．Organicfarmersalsoplantdiversecropsthatusedifferentdepth...